| 摘要 |
PROBLEM TO BE SOLVED: To prevent abrasion of a vane, and to thin a casing, by efficiently delivering a working fluid by securing the contact area with an inner peripheral surface of a pump room of a vane. SOLUTION: A suction port 20 communicating with an operation chamber 5 of a volume expanding process and a delivery port 21 communicating with the operation chamber 5 of a volume reducing process, are formed on the inner peripheral surface 2a of the pump room 2. The delivery port 21 is arranged in a position dislocated from the respective vanes 4 in the thrust direction of a rotor 3. A suction passage 6 communicating with the suction port 20 and a delivery passage 7 communicating with a delivery port 21, are formed in the casing 10. The suction passage 6 and the delivery passage 7 are formed in a position overlapping with the pump room 2 in the radial direction of the rotor 3. A dimension in the thrust direction of the rotor 3 of the delivery port 21, is set shorter than a diameter of an outlet part of the delivery passage 7. A dimension in the direction along the inner peripheral surface 2a of the pump room 2 of the delivery port 21, is set longer than the diameter of the outlet part of the delivery passage 7. COPYRIGHT: (C)2009,JPO&INPIT
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